Miter-box.



C. W. SPAULDING.

MITER BOX.

APPUCAUQN man 0m12.191s.

Patented Apr. 22, 1919.

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MITER BOX.

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C. W. SPAULDING.

MITER BOX.

APPLICATION FILED OCT. 2, |915.

,Patented Apr. 22, 1919.

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i nvwlfo@ i GW. Spaulding CLARENCE W. SPAULDING, OF MUSKEGON HEIGHTS, MICHIGAN.

MITER-BOX.

Specification of Letters Patent.

Patented .1p1-.aa 191e.

Application filed October 2, 1915. Serial No. 53,841.

To all whom t may concern.'

Be it known that I, CLARENCE WASHINGTON SPAULDI'NG, a citizen of the United States, residing at Muskegon Heights', in the county of Muskegon and State of Michigan, have invented certain new and useful Improvements in Miter-Boxes; and I do hereby devision of a device of this character embodying a novel form of saw support having movement either on a horizontal axis or a vertical axis.

Another object is the provision of means for automatically locking the saw support in vertical position. 1

With these and other objects in view, the invention consists in the novel construction, arrangement and formation of parts as will be hereinafter specifically described, claimed and illustrated in the accompanying drawings, in which,

Figure 1 represents a top plan view of the miter-box,

Fig. 2 represents a transverse sectional view partly broken away, on the line 2-2 of Fig. 1,

Fig. 3 represents a rear elevation of the miter-box, partly broken away,

Fig. 1 represents a transverse sectional View through the device, showing in detail the support and automatic locking device for the saw support, and

Fig. 5 is a section taken on the vertical plane indicated by the line 5#5 of Fig. 1.

Referring to the drawing in detail, wherein similar reference numerals designate corresponding parts throughout the several views, the numeral 10 indicates supporting legs formed integral with a frame structure over which is secured the bottom board 11. A back 12 is removably secured to the back bar 10a of the frame structure by screws or winged nuts 13.

The saw supporting or the guiding frame is supported by a block 14 having a longitudinal bore 15 and a downwardly projecting threadedshank 16 positioned through an opening formed in a horizontal bracket arm 10b and secured in operative position thereon by a nut 17 threaded on said shank. The bracket arm 10b projects inwardly from the back bar 10-. A shaft 18 is rotatably mounted within the bore 15 of the block 14: and extends a distance outwardly of the sides of the bottom 11, the extreme ends of said shaft carrying blocks 19. A vertical groove 20 intersecting the bore 15 is formed through one end of block 14, and is adapted to receive -a locking pin 21 secured to the shaft 18 for automatically locking the shaft 18 when the blocks 19 assume a horizontal position. A spring 22 is coiled around the shaft 18 and disposed between the block 11 and one of the blocks 19, and effects the automatic seating' of the pin 21 in the groove 20when said pin is moved to a vertical position by the shaft 18. A quadrant 23 which has its upper surface graduated as shown in Fig. 1 of the drawings and which is curved concentrically with the pivotal axis of the block 141, is formed integral with the front bar 10c of the frame 10a and arranged under the shaft 18 for supporting and bracing the' latter. The ybase 25 of a U-shaped member formed with parallel arms 26 is arranged on the quadrant 23, and the arms 26 are centrally apertured to receive the shaft 18. A shaft 27 is rotatably journaled in the meinber 25 and is formed with a cam face 28 adapted to engage the lower outer edge of the quadrant 23 when the handle 29 is rotated in one direction so as to clamp the member 25 rigid with the quadrant 23.

A pair of standards 30 is secured to each block 19. The standards extend vertically and slidably receive the saw guides and supports 31 formed with vertical slots 32 to receive the saw. The upper ends of each pair of standards 30 adjustably receive a block 33 provided with a set screw 341 by means of which said blocks are secured against accidental movement on the standards 30. A connecting bar 35 is secured to and between the blocks 33 for securing the upper ends of the standards 30 against relative movements.

A pair of arms 36 are pivotally connected at 37 to the rear face of the back 12 on opposite sides of the saw receiving opening 38 in the latter. Each arm 36 is provided with a slot 40 which is curved conoentrically with the pivotal axis 37 of the arm and which receives the winged nut 39 to lock the arm in various adjusted positions. The arms 36 are adapted to support the saw carrying frame when *cutting at various vertical angles. T0 permit of the accurate and quick adjustment of the arms 3G the rear side of the back 12 is graduated on both sides of the saw receiving openings 38 as illustrated in F ig. 3 of the drawings. The back bar 10a and the front bar l()c are provided with openings to permit the saw carrying frame tobe swung about its vertical axis 16.

In operation, the shaft 18 is released by rotating the handle 29 t0 disengage the cam 28 from the quadrant 23; the shaft 18 and cooperating parts are then swung to the proper angle on the pivotal axis 16 of the block 14. The frame is subsequently locked in adjusted position by turning the handle 29 to engage vthe cam face 28 of the shaft 27 against the quadrant 23. If desired, the shaft 18 may be moved longitudinally to disengage the pin 21 from the groove 20 and the shaft 18 rotated to tilt the guides 31 and saw to any desired position. In this adjustment, one of the pivoted arms 36 is adjusted to be engaged by rod to support the saw at the desired angle. It will Ibe understood that when the shaft 18 is rotated to move the pin :21 to a. vertical position, the spring A22 automatically actuates the shaft 18 to seat ythe pin 21 in the groove 2O and thus lock the saw Vframe in a verticalposition.

What I claim is 1. A miter boX including a base, a back, a pivoted supporting block, a shaft rotatably and slidably mounted in said block, rods carried by the ends of the shaft, sawl guides and supports carried by said rods, a bar located between and adjustably secured to said rods, an arm pivotally secured at its lower end to said back on each side of said shaft, means adapted to secure said arms in various angular positions with relation to the vertical, said arms being adapted to cooperate with the bar to support the barin various angular positions with relation to the vertical, means by which said block may be secured against movement, and means by which the shaft may be held against rotation with relation to said block.

2. A miter box including a quadrant, a U-shaped member straddling said quadrant and yhaving alining openings in the arms thereof at a point above said quadrant, a locking cam carried by sai-d member and adapted to be moved into and out of engagement with the lower outer edge of the quadrant, and a shaft slidalbly and rotatably mounted in the openings of said member.

In testimony whereof I aliix my signature in presence of two witnesses.

CLARENCE W. SPAULDING.

Witnesses:

CHARLES H. REDMAN, GRACE REDMAN.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents. Washington, D. C. 

